The Precambrian Period is the oldest period in geological history. The precambrian period refers to the entire period of Earth's history prior to the formation of the oldest rocks in which fossils can be found.
But in recent decades, geologists have discovered that in the pre-Cabrian period there were fossils that were difficult to see. Currently, Riau Online will discuss about National geographic, the development of the earth and the history of its life, see the following review.
Paleozoic era. This period lasted 541,000,000-252,000,000 years ago. This era was marked by the emergence of various new life forms and the migration of several continents of the earth from the southern to the northern hemisphere.
National geographic, The development of the earth and its life history is the Mesozoic Era which took place in the past year. In this era dinosaurs appeared.
Dinosaurs ruled the earth for nearly 200 million years. During the Mesozoic era, the continents that exist today merged into a supercontinent. Her name is Pangea. The Mesozoic way is divided into three periods as follows.
Triassic Period (195-225 million years ago). Bush-covered deserts and mountains span most of the earth's land.
Jurassic Period (135-195 million years ago). During this period, most of the food consisted of forests or plains of Java with meandering lakes and rivers.
Cretan Period (64-136 million years ago). In this period the rivers began to flow slowly and form large deltas.
The Cenozoic era lasted 66 million years ago to the present day. In this era the continents are assumed to be configured. This period consists of two periods, namely the Paleogene and Neogene periods.
The Paleogene period consists of the Paleocene, Eocene and Oligocene periods. The paleocene and ocene times began about 60 million years ago and lasted about 200 million years ago.
The Neogene/quarter period consists of 4 words, namely Miocene, Pleistocene, Pleistocene and Holocene. The Miocene began about 26 million years ago.
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